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The nuclear stability curve depicts the binding energy per nucleon as a function of the mass number (A) of atomic nuclei. The curve shows that nuclei with intermediate mass numbers, around A = 56 for iron, have the highest binding energy per nucleon, indicating the greatest stability.
At a short range (around 1–3 fm), nucleons are bound by the strong nuclear force. Below 1 fm, the strong nuclear force is repulsive in order to prevent the nucleus from collapsing. At longer ranges, the electromagnetic force acts between protons, so more protons cause more instability.
Nuclear Equations. There are 3 main types of nuclear equations: Alpha decay. Beta decay. Gamma decay
The N-Z Graph. A graph of the number of protons (Z) against the number of neutrons (N) can be used to predict which isotopes are stable and which will emit alpha or beta radiation. Below is a N – Z graph: The bold black line running through the graph represents the stability line.
Nuclear stability refers to the tendency of a nucleus of an atom to decay, which means to change into something else. If the isotope of an element (called a nuclide) is unstable (not stable), the nuclide has the tendency of emitting some kind of radiation, and is called radioactive. Radioactivity is associated with unstable nuclides.
29 Ιουλ 2023 · All the stable nuclei lie within a definite area called the zone of stability. For low atomic numbers most stable nuclei have a neutron/proton ratio which is very close to 1. As the atomic number increases, the zone of stability corresponds to a gradually increasing neutron/proton ratio.
